The magnetic pressure seam welding is one of the candidate methods to join thin sheet multifunctional materials. In this research, to demonstrate the wavy morphology at the joint interface produced by the magnetic pressure seam welding, numerical simulations of the impact were carried out by using a commercial Euler-Lagrange coupling software MSC. Dytran (MSC. Software), where the friction between the dissimilar sheets (Fe and Al) and the oxide layer adhered to the original sheet (Al) were selected as the considerable important factors in the formation of joint interface. From the serial numerical results, it was found that the effect of friction on the success of magnetic pressure seam welding would be little although the movement of Al along the interface would be prevented and the deformation of Fe slightly increased with increasing the coefficient of friction. By considering the deformation of oxide layer, the wavy morphology at interface could be demonstrated. Also, from the comparison between the numerical analyses and microstructural observations, it can be considered that the deformation of oxide layer obtained might be related to the creation of intermediate phase layer tracing the wavy morphology.
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